QUICK FACTS Location: Deschutes, Jefferson and western Crook counties Smoke source: Flat Fire ** Información en español ** The Oregon Department of Environmental Quality lifted an air quality advisory Monday, Aug. 25, for Deschutes, Jefferson and western Crook counties , due to improved smoke conditions and a favorable weather forecast. DEQ expects intermittent smoke in Deschutes and Jefferson counties through Thursday morning, Aug. 28, due to smoke from the Flat Fire . Air quality may improve during the day, but smoke is likely to return overnight . Smoke levels can change rapidly depending on weather. Check current conditions on the Oregon Smoke Information Blog , DEQ’s Air Quality Index , or by downloading the free OregonAIR app on your smartphone. Smoke can irritate the eyes and lungs and worsen some medical conditions. People most at risk include infants and young children, people with heart or lung disease, older adults and pregnant people. Protect yourself and ...